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參數資料
| 型號： | PCA9501 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 8-bit I2C and SMBus I/O port with interrupt, 2-kbit EEPROM and 6 address pins |
| 中文描述： | 8位I2C和SMBus I / O口的中斷，2千比特的EEPROM和6個地址引腳 |
| 文件頁數： | 12/22頁 |
| 文件大小： | 146K |
| 代理商： | PCA9501 |
Philips Semiconductors
8-bit I
2
C and SMBus I/O port with interrupt,
2-kbit EEPROM and 6 address pins
Product data
PCA9501
2003 Sep 12
12
Acknowledge (see Figure 19)
The number of data bytes transferred between the start and the stop
conditions from transmitter to receiver is not limited. Each byte of
eight bits is followed by one acknowledge bit. The acknowledge bit
is a HIGH level put on the bus by the transmitter whereas the
master generates an extra acknowledge related clock pulse.
A slave receiver which is addressed must generate an acknowledge
after the reception of each byte. Also a master must generate an
acknowledge after the reception of each byte that has been clocked
out of the slave transmitter. The device that acknowledges has to
pull down the SDA line during the acknowledge clock pulse, so that
the SDA line is stable LOW during the HIGH period of the
acknowledge related clock pulse, set-up and hold times must be
taken into account.
A master receiver must signal an end of data to the transmitter by
not generating an acknowledge on the last byte that has been
clocked out of the slave. In this event the transmitter must leave the
data line HIGH to enable the master to generate a stop condition.
S
9
8
2
1
SW00545
DATA OUTPUT
BY TRANSMITTER
DATA OUTPUT
BY RECEIVER
SCL FROM
MASTER
ACKNOWLEDGE
NOT ACKNOWLEDGE
CLOCK PULSE FOR
ACKNOWLEDGEMENT
START
CONDITION
Figure 19. Acknowledgment on the I
2
C-bus
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相關代理商/技術參數 |
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| PCA9501A | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Smart, simple solutions for the 12 most common design concerns |
| PCA9501BS | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit I2C and SMBus I/O port with interrupt, 2-kbit EEPROM and 6 address pins |
| PCA9501BS,118 | 功能描述:接口-I/O擴展器 8BIT I2C FMQB GPIONT RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| PCA9501BS,118-CUT TAPE | 制造商:NXP 功能描述:8-bit 8 I/O I2C-bus Expander On Board 2 kb EEPROM Surface Mount - HVQFN-20 |
| PCA9501BS-T | 功能描述:接口-I/O擴展器 8BIT I2C FMQB GPIONT PU2K EPR RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
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